1results about How to "Reduce current amplitude" patented technology

The utility model discloses a reverse flow detection circuit and a power supply device, which are used for meeting the reverse flow fault detection requirement of equipment in a high-power power supply scene and reducing the cost of the reverse flow detection device. The backward flow detection circuit comprises a mutual inductor, an impedance module and an amplifier. A primary winding of the mutual inductor is used for being connected with a to-be-tested branch, and a secondary winding of the mutual inductor is connected with the impedance module; the impedance module is connected with the processing device through the amplifier; and the amplifier is used for amplifying the electrical parameters output by the impedance module and then outputting the electrical parameters to the processing device, so that the processing device performs backward flow fault detection according to the electrical parameters output by the amplifier. As the impedance module used for limiting the current is additionally arranged on the secondary side of the mutual inductor, when the reverse irrigation detection circuit is applied to a high-power power supply scene, the amplitude of the secondary current output by the mutual inductor can also be limited within a small range, and safe operation of a rear-end connecting device is ensured.